Beside they are compatible with privacy friendly android roms such as lineage os, you can also install gnu/linux distros, especially pure os on the librem.

Post number #608435, ID: 4786e5
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>>608432I use VoIP with linphone. I have to pay for an account by a service provider that supports the official VoIP standards (unlike "skype").It requires internet connection, but it also works via mobile internet, which also costs money."Free as in freedom but not as in free beer."

Post number #608438, ID: 16a1fa
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Or you could just tune down your freetardism and choose more viable options.